Adaptive clock rate for high speed data communications

ABSTRACT

A method adaptively adjusts an internal clock rate and/or supply voltage based on an indication from a scheduling channel. A UE determines whether high speed data has been scheduled. The UE adjusts the clock speed and/or supply voltage based on the determination.

BACKGROUND

1. Field

Aspects of the present disclosure relate generally to wirelesscommunication systems, and more particularly, to conserving UE batterypower by adaptively adjusting an internal clock rate.

2. Background

Wireless communication networks are widely deployed to provide variouscommunication services such as telephony, video, data, messaging,broadcasts, and so on. Such networks, which are usually multiple accessnetworks, support communications for multiple users by sharing theavailable network resources. One example of such a network is theUniversal Terrestrial Radio Access Network (UTRAN). The UTRAN is theradio access network (RAN) defined as a part of the Universal MobileTelecommunications System (UMTS), a third generation (3G) mobile phonetechnology supported by the 3rd Generation Partnership Project (3GPP).The UMTS, which is the successor to Global System for MobileCommunications (GSM) technologies, currently supports various airinterface standards, such as Wideband-Code Division Multiple Access(W-CDMA), Time Division-Code Division Multiple Access (TD-CDMA), andTime Division-Synchronous Code Division Multiple Access (TD-SCDMA). Forexample, China is pursuing TD-SCDMA as the underlying air interface inthe UTRAN architecture with its existing GSM infrastructure as the corenetwork. The UMTS also supports enhanced 3G data communicationsprotocols, such as High Speed Packet Access (HSPA), which provideshigher data transfer speeds and capacity to associated UMTS networks.HSPA is a collection of two mobile telephony protocols, High SpeedDownlink Packet Access (HSDPA) and High Speed Uplink Packet Access(HSUPA), that extends and improves the performance of existing widebandprotocols.

As the demand for mobile broadband access continues to increase,research and development continue to advance the UMTS technologies notonly to meet the growing demand for mobile broadband access, but toadvance and enhance the user experience with mobile communications.

SUMMARY

In one aspect, a method of wireless communication is disclosed. Themethod includes determining whether high speed data has been scheduled.The clock speed and/or supply voltage is adjusted based at least in parton the determination.

Another aspect discloses an apparatus for wireless communication havinga memory and at least one processor coupled to the memory. Theprocessor(s) is configured to determine whether high speed data has beenscheduled. The processor(s) is also configured to adjust at least one ofa clock speed or a supply voltage based at least in part on thedetermination.

In another aspect, a computer program product for wireless communicationin a wireless network, having a non-transitory computer-readable mediumis disclosed. The computer readable medium has non-transitory programcode recorded thereon which, when executed by a processor(s), causes theprocessor(s) to perform operations of determining whether high speeddata has been scheduled. The program code also causes the processor(s)to adjust at least one of a clock speed or a supply voltage based atleast in part on the determination.

Another aspect discloses an apparatus for wireless communication andincludes means for determining whether high speed data has beenscheduled. The apparatus also includes means for adjusting at least oneof a clock speed or a supply voltage based at least in part on thedetermination.

This has outlined, rather broadly, the features and technical advantagesof the present disclosure in order that the detailed description thatfollows may be better understood. Additional features and advantages ofthe disclosure will be described below. It should be appreciated bythose skilled in the art that this disclosure may be readily utilized asa basis for modifying or designing other structures for carrying out thesame purposes of the present disclosure. It should also be realized bythose skilled in the art that such equivalent constructions do notdepart from the teachings of the disclosure as set forth in the appendedclaims. The novel features, which are believed to be characteristic ofthe disclosure, both as to its organization and method of operation,together with further objects and advantages, will be better understoodfrom the following description when considered in connection with theaccompanying figures. It is to be expressly understood, however, thateach of the figures is provided for the purpose of illustration anddescription only and is not intended as a definition of the limits ofthe present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The features, nature, and advantages of the present disclosure willbecome more apparent from the detailed description set forth below whentaken in conjunction with the drawings in which like referencecharacters identify correspondingly throughout.

FIG. 1 is a block diagram conceptually illustrating an example of atelecommunications system.

FIG. 2 is a block diagram conceptually illustrating an example of aframe structure in a telecommunications system.

FIG. 3 is a block diagram conceptually illustrating an example of a nodeB in communication with a UE in a telecommunications system.

FIG. 4 is a block diagram illustrating a method for controlling a clockrate, according to one aspect of the present disclosure.

FIG. 5 is a diagram illustrating an example of a hardware implementationfor an apparatus employing a processing system according to one aspectof the present disclosure.

DETAILED DESCRIPTION

The detailed description set forth below, in connection with theappended drawings, is intended as a description of variousconfigurations and is not intended to represent the only configurationsin which the concepts described herein may be practiced. The detaileddescription includes specific details for the purpose of providing athorough understanding of the various concepts. However, it will beapparent to those skilled in the art that these concepts may bepracticed without these specific details. In some instances, well-knownstructures and components are shown in block diagram form in order toavoid obscuring such concepts.

Turning now to FIG. 1, a block diagram is shown illustrating an exampleof a telecommunications system 100. The various concepts presentedthroughout this disclosure may be implemented across a broad variety oftelecommunication systems, network architectures, and communicationstandards. By way of example and without limitation, the aspects of thepresent disclosure illustrated in FIG. 1 are presented with reference toa UMTS system employing a TD-SCDMA standard. In this example, the UMTSsystem includes a (radio access network) RAN 102 (e.g., UTRAN) thatprovides various wireless services including telephony, video, data,messaging, broadcasts, and/or other services. The RAN 102 may be dividedinto a number of Radio Network Subsystems (RNSs) such as an RNS 107,each controlled by a Radio Network Controller (RNC) such as an RNC 106.For clarity, only the RNC 106 and the RNS 107 are shown; however, theRAN 102 may include any number of RNCs and RNSs in addition to the RNC106 and RNS 107. The RNC 106 is an apparatus responsible for, amongother things, assigning, reconfiguring and releasing radio resourceswithin the RNS 107. The RNC 106 may be interconnected to other RNCs (notshown) in the RAN 102 through various types of interfaces such as adirect physical connection, a virtual network, or the like, using anysuitable transport network.

The geographic region covered by the RNS 107 may be divided into anumber of cells, with a radio transceiver apparatus serving each cell. Aradio transceiver apparatus is commonly referred to as a node B in UMTSapplications, but may also be referred to by those skilled in the art asa base station (BS), a base transceiver station (BTS), a radio basestation, a radio transceiver, a transceiver function, a basic serviceset (BSS), an extended service set (ESS), an access point (AP), or someother suitable terminology. For clarity, two node Bs 108 are shown;however, the RNS 107 may include any number of wireless node Bs. Thenode Bs 108 provide wireless access points to a core network 104 for anynumber of mobile apparatuses. Examples of a mobile apparatus include acellular phone, a smart phone, a session initiation protocol (SIP)phone, a laptop, a notebook, a netbook, a smartbook, a personal digitalassistant (PDA), a satellite radio, a global positioning system (GPS)device, a multimedia device, a video device, a digital audio player(e.g., MP3 player), a camera, a game console, or any other similarfunctioning device. The mobile apparatus is commonly referred to as userequipment (UE) in UMTS applications, but may also be referred to bythose skilled in the art as a mobile station (MS), a subscriber station,a mobile unit, a subscriber unit, a wireless unit, a remote unit, amobile device, a wireless device, a wireless communications device, aremote device, a mobile subscriber station, an access terminal (AT), amobile terminal, a wireless terminal, a remote terminal, a handset, aterminal, a user agent, a mobile client, a client, or some othersuitable terminology. For illustrative purposes, three UEs 110 are shownin communication with the node Bs 108. The downlink (DL), also calledthe forward link, refers to the communication link from a node B to aUE, and the uplink (UL), also called the reverse link, refers to thecommunication link from a UE to a node B.

The core network 104, as shown, includes a GSM core network. However, asthose skilled in the art will recognize, the various concepts presentedthroughout this disclosure may be implemented in a RAN, or othersuitable access network, to provide UEs with access to types of corenetworks other than GSM networks.

In this example, the core network 104 supports circuit-switched serviceswith a mobile switching center (MSC) 112 and a gateway MSC (GMSC) 114.One or more RNCs, such as the RNC 106, may be connected to the MSC 112.The MSC 112 is an apparatus that controls call setup, call routing, andUE mobility functions. The MSC 112 also includes a visitor locationregister (VLR) (not shown) that contains subscriber-related informationfor the duration that a UE is in the coverage area of the MSC 112. TheGMSC 114 provides a gateway through the MSC 112 for the UE to access acircuit-switched network 116. The GMSC 114 includes a home locationregister (HLR) (not shown) containing subscriber data, such as the datareflecting the details of the services to which a particular user hassubscribed. The HLR is also associated with an authentication center(AuC) that contains subscriber-specific authentication data. When a callis received for a particular UE, the GMSC 114 queries the HLR todetermine the UE's location and forwards the call to the particular MSCserving that location.

The core network 104 also supports packet-data services with a servingGPRS support node (SGSN) 118 and a gateway GPRS support node (GGSN) 120.GPRS, which stands for General Packet Radio Service, is designed toprovide packet-data services at speeds higher than those available withstandard GSM circuit-switched data services. The GGSN 120 provides aconnection for the RAN 102 to a packet-based network 122. Thepacket-based network 122 may be the Internet, a private data network, orsome other suitable packet-based network. The primary function of theGGSN 120 is to provide the UEs 110 with packet-based networkconnectivity. Data packets are transferred between the GGSN 120 and theUEs 110 through the SGSN 118, which performs primarily the samefunctions in the packet-based domain as the MSC 112 performs in thecircuit-switched domain.

The UMTS air interface is a spread spectrum Direct-Sequence CodeDivision Multiple Access (DS-CDMA) system. The spread spectrum DS-CDMAspreads user data over a much wider bandwidth through multiplication bya sequence of pseudorandom bits called chips. The TD-SCDMA standard isbased on such direct sequence spread spectrum technology andadditionally calls for a time division duplexing (TDD), rather than afrequency division duplexing (FDD) as used in many FDD mode UMTS/W-CDMAsystems. TDD uses the same carrier frequency for both the uplink (UL)and downlink (DL) between a node B 108 and a UE 110, but divides uplinkand downlink transmissions into different time slots in the carrier.

FIG. 2 shows a frame structure 200 for a TD-SCDMA carrier. The TD-SCDMAcarrier, as illustrated, has a frame 202 that is 10 ms in length. Thechip rate in TD-SCDMA is 1.28 Mcps. The frame 202 has two 5 ms subframes204, and each of the subframes 204 includes seven time slots, TS0through TS6. The first time slot, TS0, is usually allocated for downlinkcommunication, while the second time slot, TS1, is usually allocated foruplink communication. The remaining time slots, TS2 through TS6, may beused for either uplink or downlink, which allows for greater flexibilityduring times of higher data transmission times in either the uplink ordownlink directions. A downlink pilot time slot (DwPTS) 206, a guardperiod (GP) 208, and an uplink pilot time slot (UpPTS) 210 (also knownas the uplink pilot channel (UpPCH)) are located between TS0 and TS1.Each time slot, TS0-TS6, may allow data transmission multiplexed on amaximum of 16 code channels. Data transmission on a code channelincludes two data portions 212 (each with a length of 352 chips)separated by a midamble 214 (with a length of 144 chips) and followed bya guard period (GP) 216 (with a length of 16 chips). The midamble 214may be used for features, such as channel estimation, while the guardperiod 216 may be used to avoid inter-burst interference. Alsotransmitted in the data portion is some Layer 1 control information,including Synchronization Shift (SS) bits 218. Synchronization Shiftbits 218 only appear in the second part of the data portion. TheSynchronization Shift bits 218 immediately following the midamble canindicate three cases: decrease shift, increase shift, or do nothing inthe upload transmit timing. The positions of the SS bits 218 are notgenerally used during uplink communications.

FIG. 3 is a block diagram of a node B 310 in communication with a UE 350in a RAN 300, where the RAN 300 may be the RAN 102 in FIG. 1, the node B310 may be the node B 108 in FIG. 1, and the UE 350 may be the UE 110 inFIG. 1. In the downlink communication, a transmit processor 320 mayreceive data from a data source 312 and control signals from acontroller/processor 340. The transmit processor 320 provides varioussignal processing functions for the data and control signals, as well asreference signals (e.g., pilot signals). For example, the transmitprocessor 320 may provide cyclic redundancy check (CRC) codes for errordetection, coding and interleaving to facilitate forward errorcorrection (FEC), mapping to signal constellations based on variousmodulation schemes (e.g., binary phase-shift keying (BPSK), quadraturephase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadratureamplitude modulation (M-QAM), and the like), spreading with orthogonalvariable spreading factors (OVSF), and multiplying with scrambling codesto produce a series of symbols. Channel estimates from a channelprocessor 344 may be used by a controller/processor 340 to determine thecoding, modulation, spreading, and/or scrambling schemes for thetransmit processor 320. These channel estimates may be derived from areference signal transmitted by the UE 350 or from feedback contained inthe midamble 214 (FIG. 2) from the UE 350. The symbols generated by thetransmit processor 320 are provided to a transmit frame processor 330 tocreate a frame structure. The transmit frame processor 330 creates thisframe structure by multiplexing the symbols with a midamble 214 (FIG. 2)from the controller/processor 340, resulting in a series of frames. Theframes are then provided to a transmitter 332, which provides varioussignal conditioning functions including amplifying, filtering, andmodulating the frames onto a carrier for downlink transmission over thewireless medium through smart antennas 334. The smart antennas 334 maybe implemented with beam steering bidirectional adaptive antenna arraysor other similar beam technologies.

At the UE 350, a receiver 354 receives the downlink transmission throughan antenna 352 and processes the transmission to recover the informationmodulated onto the carrier. The information recovered by the receiver354 is provided to a receive frame processor 360, which parses eachframe, and provides the midamble 214 (FIG. 2) to a channel processor 394and the data, control, and reference signals to a receive processor 370.The receive processor 370 then performs the inverse of the processingperformed by the transmit processor 320 in the node B 310. Morespecifically, the receive processor 370 descrambles and despreads thesymbols, and then determines the most likely signal constellation pointstransmitted by the node B 310 based on the modulation scheme. These softdecisions may be based on channel estimates computed by the channelprocessor 394. The soft decisions are then decoded and deinterleaved torecover the data, control, and reference signals. The CRC codes are thenchecked to determine whether the frames were successfully decoded. Thedata carried by the successfully decoded frames will then be provided toa data sink 372, which represents applications running in the UE 350and/or various user interfaces (e.g., display). Control signals carriedby successfully decoded frames will be provided to acontroller/processor 390. When frames are unsuccessfully decoded by thereceiver processor 370, the controller/processor 390 may also use anacknowledgement (ACK) and/or negative acknowledgement (NACK) protocol tosupport retransmission requests for those frames.

In the uplink, data from a data source 378 and control signals from thecontroller/processor 390 are provided to a transmit processor 380. Thedata source 378 may represent applications running in the UE 350 andvarious user interfaces (e.g., keyboard). Similar to the functionalitydescribed in connection with the downlink transmission by the node B310, the transmit processor 380 provides various signal processingfunctions including CRC codes, coding and interleaving to facilitateFEC, mapping to signal constellations, spreading with OVSFs, andscrambling to produce a series of symbols. Channel estimates, derived bythe channel processor 394 from a reference signal transmitted by thenode B 310 or from feedback contained in the midamble transmitted by thenode B 310, may be used to select the appropriate coding, modulation,spreading, and/or scrambling schemes. The symbols produced by thetransmit processor 380 will be provided to a transmit frame processor382 to create a frame structure. The transmit frame processor 382creates this frame structure by multiplexing the symbols with a midamble214 (FIG. 2) from the controller/processor 390, resulting in a series offrames. The frames are then provided to a transmitter 356, whichprovides various signal conditioning functions including amplification,filtering, and modulating the frames onto a carrier for uplinktransmission over the wireless medium through the antenna 352.

The uplink transmission is processed at the node B 310 in a mannersimilar to that described in connection with the receiver function atthe UE 350. A receiver 335 receives the uplink transmission through theantenna 334 and processes the transmission to recover the informationmodulated onto the carrier. The information recovered by the receiver335 is provided to a receive frame processor 336, which parses eachframe, and provides the midamble 214 (FIG. 2) to the channel processor344 and the data, control, and reference signals to a receive processor338. The receive processor 338 performs the inverse of the processingperformed by the transmit processor 380 in the UE 350. The data andcontrol signals carried by the successfully decoded frames may then beprovided to a data sink 339 and the controller/processor, respectively.If some of the frames were unsuccessfully decoded by the receiveprocessor, the controller/processor 340 may also use an acknowledgement(ACK) and/or negative acknowledgement (NACK) protocol to supportretransmission requests for those frames.

The controller/processors 340 and 390 may be used to direct theoperation at the node B 310 and the UE 350, respectively. For example,the controller/processors 340 and 390 may provide various functionsincluding timing, peripheral interfaces, voltage regulation, powermanagement, and other control functions. The computer readable media ofmemories 342 and 392 may store data and software for the node B 310 andthe UE 350, respectively. For example, the memory 392 of the UE 350 maystore a clock rate adjusting module 391 which, when executed by thecontroller/processor 390, configures the UE 350 for controlling a clockrate under certain conditions. A scheduler/processor 346 at the node B310 may be used to allocate resources to the UEs and schedule downlinkand/or uplink transmissions for the UEs.

High speed uplink packet access (HSDPA) is an enhancement to TD-SCDMA,and is utilized to enhance downlink throughput. The TD-SCDMA HSDPAsystems include physical channels such as, the high speed physicaldownlink shared channel (HS-PDSCH), high speed shared control channel(HS-SCCH) and high speed shared information channel (HS-SICH). TheHS-PDSCH carries a user data burst.

The HS-SCCH carries the modulation and coding scheme for the data burstin HS-PDSCH. The HS-SCCH also carries the channelization code and timeslot information for the data burst in HS-PDSCH as well as the UEidentity to indicate which UE should receive the data burst allocation.The UE is allocated with some resources by the HS-SCCH before the UE canreceive high speed data on HS-PDSCH.

The HS-SICH carries the channel quality indicator (CQI) which includesthe recommended transport block size (RTBS) and the recommendedmodulation format (RMF). The HS-SICH also carries HARQ acknowledgementindicator (ACK/NACK) of the HS-PDSCH transmission.

High speed uplink packet access (HSUPA) is an enhancement to TD-SCDMA,and is utilized to enhance uplink throughput. HSUPA introduces thefollowing physical channels: enhanced uplink dedicated channel (E-DCH),E-DCH physical uplink channel (E-PUCH), E-DCH random access uplinkcontrol channel (E-RUCCH), absolute grant channel for E-DCH and hybridARQ indication channel for E-DCH (E-AGCH), and the hybrid ARQ indicationchannel for E-DCH (E-HICH).

The E-DCH is a dedicated transport channel and may be utilized toenhance an existing dedicated channel (DCH) carrying data traffic. TheE-PUCH carries E-DCH traffic and associated control information (E-UCCH)in each E-DCH transmission time interval (TTT). In a timeslot designatedby UTRAN for E-PUCH, up to one E-PUCH may be transmitted by a UE.

The E-RUCCH is an uplink physical control channel that carriesscheduling information used for identifying the UEs. The E-RUCCH is usedto carry E-DCH-associated uplink control signaling when E-PUCH resourcesare not available. The characteristics of the E-RUCCH physical channelare the same as the characteristics of the physical random accesschannel (PRACH). The E-RUCCH may be mapped to the same physicalresources that are assigned for PRACH.

The E-AGCH is a downlink physical channel carrying the uplink absolutegrant control information, including granted traffic to pilot powerratio, code resource information, time slot resource information, etc.The E-RNTI (E-DCH radio network temporary identifier) of the UE to begranted is used for the cyclic redundancy check (CRC) attachment in theinformation transmitted on the E-AGCH. That is, the 16-bit CRC is maskedwith the 16-bit E-RNTI of the UE. Therefore, it can be known which UEshould receive the absolute grant.

The E-HICH carries the uplink E-DCH HARQ acknowledgement indicator(ACK/NAK) signals. The UE is allocated with resources by the E-AGCHbefore the UE can transmit high speed data on the E-PUCH.

The above high speed channels can be dynamically allocated by theHS-SCCH or E-AGCH as opposed to the DPCH (dedicated physical channel)which is statically configured. The UE power consumption is a criticalperformance metric. The UE can transmit or receive at a high speed datarate and consume more power than when the UE transmits/receives at alower speed data rate. Power consumption is directly related to theclock rate of the application specific integrated chip (ASIC).Transmitting or receiving high speed data uses a higher CPU clock rate,which consumes more power than the low speed scenario. That is,currently systems always use the same (higher) clock rate, assuming theworst use case. Similarly, the same supply voltage is used, regardlessof a scheduled data rate.

One aspect of the present disclosure is directed to adjusting the clockrate to reduce battery waste. In particular, in one aspect the UEadaptively adjusts the CPU clock rate based on whether high speed datahas been scheduled. For example, in one aspect, the UE receives ascheduling channel, such as the HS-SCCH and E-AGCH. The HS-SCCH and/orE-AGCH are decoded. Based on the information in the scheduling channel(e.g., HS-SCCH, E-AGCH), the UE will determine whether to adjust theclock rate. For example, if the decoded HS-SCCH or E-AGCH indicates thatthe UE will transmit and receive high speed data, the UE utilizes ahigher clock rate. Alternately, if HS-SCCH and E-AGCH do not indicatethe UE will transmit and receive high speed data, a lower clock rate isutilized. That is, the clock rate is adjusted based on a data rateassignment.

The clock rate can be adjusted based on the mere existence of a highspeed scheduling channel. That is, rather than decoding the content ofthe channel, the clock rate is changed when a high speed schedulingchannel is received.

Similarly, without looking at content of an assignment, the clock ratecan be adjusted. That is, the mere existence of an assignment within thehigh speed scheduling channel can cause the clock rate to be increased.

In another aspect, if the UE is not allocated by the HS-SCCH and E-AGCHfor some time, and a higher clock rate is being used, the UE switches toa lower clock rate. Additionally, in another aspect, a timer value ofzero can indicate a special case for immediately switching the clockrate. In one example, the special case may be used to immediately reducethe power, such as in low battery power state.

In addition, or instead of adjusting clock rate, the supply voltage canbe varied. For example, if high speed data is scheduled, the supplyvoltage is increased. If high speed communication is not scheduled, alower supply voltage can be used.

FIG. 4 shows a wireless communication method 400 according to one aspectof the disclosure. In block 402, a UE determines whether high speed datahas been scheduled. The UE adjusts a clock speed and/or supply voltagebased on the determination, as shown in block 404.

FIG. 5 is a diagram illustrating an example of a hardware implementationfor an apparatus 500 employing a processing system 514. The processingsystem 514 may be implemented with a bus architecture, representedgenerally by the bus 524. The bus 524 may include any number ofinterconnecting buses and bridges depending on the specific applicationof the processing system 514 and the overall design constraints. The bus524 links together various circuits including one or more processorsand/or hardware modules, represented by the processor 522 the modules502, 504, and the computer-readable medium 526. The bus 524 may alsolink various other circuits such as timing sources, peripherals, voltageregulators, and power management circuits, which are well known in theart, and therefore, will not be described any further.

The apparatus includes a processing system 514 coupled to a transceiver530. The transceiver 530 is coupled to one or more antennas 520. Thetransceiver 530 enables communicating with various other apparatus overa transmission medium. The processing system 514 includes a processor522 coupled to a computer-readable medium 526. The processor 522 isresponsible for general processing, including the execution of softwarestored on the computer-readable medium 526. The software, when executedby the processor 522, causes the processing system 514 to perform thevarious functions described for any particular apparatus. Thecomputer-readable medium 526 may also be used for storing data that ismanipulated by the processor 522 when executing software.

The processing system 514 includes a determining module 502 fordetermining whether high speed data has been scheduled. The processingsystem 514 includes an adjusting module 504 for adjusting the clockspeed and/or supply voltage. The modules may be software modules runningin the processor 522, resident/stored in the computer readable medium526, one or more hardware modules coupled to the processor 522, or somecombination thereof. The processing system 514 may be a component of theUE 350 and may include the memory 392, the clock rate adjusting module391, and/or the controller/processor 390.

In one configuration, an apparatus such as a UE 350 is configured forwireless communication including means for determining. In one aspect,the determining means may be the controller/processor 390 and/or thememory 392 configured to perform the functions recited by thedetermining means. The UE 350 is also configured to include a means foradjusting. In one aspect, the adjusting means may be thecontroller/processor 390 and/or the memory 392 configured to perform thefunctions recited by the adjusting means. In another aspect, theaforementioned means may be a module or any apparatus configured toperform the functions recited by the aforementioned means.

Several aspects of a telecommunications system has been presented withreference to TD-SCDMA systems. As those skilled in the art will readilyappreciate, various aspects described throughout this disclosure may beextended to other telecommunication systems, network architectures andcommunication standards. By way of example, various aspects may beextended to other UMTS systems such as W-CDMA, High Speed DownlinkPacket Access (HSDPA), High Speed Uplink Packet Access (HSUPA), HighSpeed Packet Access Plus (HSPA+) and TD-CDMA. Various aspects may alsobe extended to systems employing Long Term Evolution (LTE) (in FDD, TDD,or both modes), LTE-Advanced (LTE-A) (in FDD, TDD, or both modes),CDMA2000, Evolution-Data Optimized (EV-DO), Ultra Mobile Broadband(UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20,Ultra-Wideband (UWB), Bluetooth, and/or other suitable systems. Theactual telecommunication standard, network architecture, and/orcommunication standard employed will depend on the specific applicationand the overall design constraints imposed on the system.

Several processors have been described in connection with variousapparatuses and methods. These processors may be implemented usingelectronic hardware, computer software, or any combination thereof.Whether such processors are implemented as hardware or software willdepend upon the particular application and overall design constraintsimposed on the system. By way of example, a processor, any portion of aprocessor, or any combination of processors presented in this disclosuremay be implemented with a microprocessor, microcontroller, digitalsignal processor (DSP), a field-programmable gate array (FPGA), aprogrammable logic device (PLD), a state machine, gated logic, discretehardware circuits, and other suitable processing components configuredto perform the various functions described throughout this disclosure.The functionality of a processor, any portion of a processor, or anycombination of processors presented in this disclosure may beimplemented with software being executed by a microprocessor,microcontroller, DSP, or other suitable platform.

Software shall be construed broadly to mean instructions, instructionsets, code, code segments, program code, programs, subprograms, softwaremodules, applications, software applications, software packages,routines, subroutines, objects, executables, threads of execution,procedures, functions, etc., whether referred to as software, firmware,middleware, microcode, hardware description language, or otherwise. Thesoftware may reside on a computer-readable medium. A computer-readablemedium may include, by way of example, memory such as a magnetic storagedevice (e.g., hard disk, floppy disk, magnetic strip), an optical disk(e.g., compact disc (CD), digital versatile disc (DVD)), a smart card, aflash memory device (e.g., card, stick, key drive), random access memory(RAM), read only memory (ROM), programmable ROM (PROM), erasable PROM(EPROM), electrically erasable PROM (EEPROM), a register, or a removabledisk. Although memory is shown separate from the processors in thevarious aspects presented throughout this disclosure, the memory may beinternal to the processors (e.g., cache or register).

Computer-readable media may be embodied in a computer-program product.By way of example, a computer-program product may include acomputer-readable medium in packaging materials. Those skilled in theart will recognize how best to implement the described functionalitypresented throughout this disclosure depending on the particularapplication and the overall design constraints imposed on the overallsystem.

It is to be understood that the specific order or hierarchy of steps inthe methods disclosed is an illustration of exemplary processes. Basedupon design preferences, it is understood that the specific order orhierarchy of steps in the methods may be rearranged. The accompanyingmethod claims present elements of the various steps in a sample order,and are not meant to be limited to the specific order or hierarchypresented unless specifically recited therein.

The previous description is provided to enable any person skilled in theart to practice the various aspects described herein. Variousmodifications to these aspects will be readily apparent to those skilledin the art, and the generic principles defined herein may be applied toother aspects. Thus, the claims are not intended to be limited to theaspects shown herein, but is to be accorded the full scope consistentwith the language of the claims, wherein reference to an element in thesingular is not intended to mean “one and only one” unless specificallyso stated, but rather “one or more.” Unless specifically statedotherwise, the term “some” refers to one or more. A phrase referring to“at least one of” a list of items refers to any combination of thoseitems, including single members. As an example, “at least one of; a, b,or c” is intended to cover: a; b; c; a and b; a and c; b and c; and a, band c. All structural and functional equivalents to the elements of thevarious aspects described throughout this disclosure that are known orlater come to be known to those of ordinary skill in the art areexpressly incorporated herein by reference and are intended to beencompassed by the claims. Moreover, nothing disclosed herein isintended to be dedicated to the public regardless of whether suchdisclosure is explicitly recited in the claims. No claim element is tobe construed under the provisions of 35 U.S.C. §112, sixth paragraph,unless the element is expressly recited using the phrase “means for” or,in the case of a method claim, the element is recited using the phrase“step for.”

What is claimed is:
 1. A method of wireless communication, comprising:determining whether high speed data has been scheduled; and adjusting atleast one of a clock speed or a supply voltage based at least in part onthe determination.
 2. The method of claim 1, in which the determiningcomprises determining whether a scheduling channel has been enabled, andthe adjusting comprises setting a low clock speed and/or a supplyvoltage when no scheduling channel has been enabled.
 3. The method ofclaim 2, in which the scheduling channel comprises a high speed sharedcontrol channel (HS-SCCH) for high speed downlink packet access (HSDPA)communications.
 4. The method of claim 2, in which the schedulingchannel comprises an enhanced dedicated channel (E-DCH) absolute grantchannel (E-AGCH) for high speed uplink packet access (HSUPA)communications.
 5. The method of claim 1, in which the determiningcomprises determining whether an assignment is included in a schedulingchannel, and the adjusting comprises setting a low clock speed and/or asupply voltage when no assignment is included in the scheduling channel.6. The method of claim 1, in which the determining comprises determiningwhether an assignment for high bit rate data is included in a schedulingchannel, and the adjusting comprises setting a low clock speed and/or asupply voltage when no assignment for high bit rate data is included inthe scheduling channel.
 7. An apparatus for wireless communication,comprising: a memory; and at least one processor coupled to the memory,the at least one processor being configured: to determine whether highspeed data has been scheduled; and to adjust at least one of a clockspeed or a supply voltage based at least in part on the determination.8. The apparatus of claim 7, in which the at least one processor isconfigured to determine by determining whether a scheduling channel hasbeen enabled, and is configured to adjust by setting a low clock speedand/or a supply voltage when no scheduling channel has been enabled. 9.The apparatus of claim 8, in which the scheduling channel comprises ahigh speed shared control channel (HS-SCCH) for high speed downlinkpacket access (HSDPA) communications.
 10. The apparatus of claim 8, inwhich the scheduling channel comprises an enhanced dedicated channel(E-DCH) absolute grant channel (E-AGCH) for high speed uplink packetaccess (HSUPA) communications.
 11. The apparatus of claim 7, in whichthe at least one processor is configured to determine by determiningwhether an assignment is included in a scheduling channel, and isconfigured to adjust by setting a low clock speed and/or a supplyvoltage when no assignment is included in the scheduling channel. 12.The apparatus of claim 7, in which the at least one processor isconfigured to determine by determining whether an assignment for highbit rate data is included in a scheduling channel, and is configured toadjust by setting a low clock speed and/or a supply voltage when noassignment for high bit rate data is included in the scheduling channel.13. A computer program product for wireless communication in a wirelessnetwork, comprising: a non-transitory computer-readable medium havingnon-transitory program code recorded thereon, the program codecomprising: program code to determine whether high speed data has beenscheduled; and program code to adjust at least one of a clock speed or asupply voltage based at least in part on the determination.
 14. Thecomputer program product of claim 13, in which the program code isfurther configured to determine by determining whether a schedulingchannel has been enabled, and the program code is further configured toadjust by setting a low clock speed and/or a supply voltage when noscheduling channel has been enabled.
 15. The computer program product ofclaim 13, in which the program code is further configured to determineby determining whether an assignment is included in a schedulingchannel, and the program code is further configured to adjust by settinga low clock speed and/or a supply voltage when no assignment is includedin the scheduling channel.
 16. The computer program product of claim 13,in which the program code is further configured to determine bydetermining whether an assignment for high bit rate data is included ina scheduling channel, and the program code is further configured toadjust by setting a low clock speed and/or a supply voltage when noassignment for high bit rate data is included in the scheduling channel.17. An apparatus for wireless communication, comprising: means fordetermining whether high speed data has been scheduled; and means foradjusting at least one of a clock speed or a supply voltage based atleast in part on the determination.
 18. The apparatus of claim 17, inwhich the means for determining comprises determining whether ascheduling channel has been enabled, and the means for adjustingcomprises setting a low clock speed and/or a supply voltage when noscheduling channel has been enabled.
 19. The computer program product ofclaim 17, in which the means for determining comprises determiningwhether an assignment is included in a scheduling channel, and the meansfor adjusting comprises by setting a low clock speed and/or a supplyvoltage when no assignment is included in the scheduling channel. 20.The computer program product of claim 17, in which the means fordetermining comprises determining whether an assignment for high bitrate data is included in a scheduling channel, and the means foradjusting comprises setting a low clock speed and/or a supply voltagewhen no assignment for high bit rate data is included in the schedulingchannel.